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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Pyrenowilmsia. Pyrenulaceae Rabenh. (1870); Pyrenulales.

Type Information: Type: Pyrenowilmsia ferruginosa (Müll. Arg.) R.C. Harris & Aptroot.

Lichen Photobionts: Primary photobiont present; trentepohlioid. Secondary photobiont absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, forming all across the thallus surface, becoming adnate to soon sessile. Wall: With a carbonized black clypeus around the ostiole, not fused. Margin: External filaments absent. Periphyses: Absent. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed.

Asci: Tholus thickened, not amyloid; ocular chamber indistinct; dehiscence bitunicate.

Ascospores: c. 8 per ascus, allantoid or curved, 12-15 µm long, 2.5-3 µm wide, obtuse; septa present; transversally septate, 3-transversally septate, formed by the endospore wall layer; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Secondary Metabolites: Present, of the following substance class(es): (anthra-)quinones.

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